I've used OpenRocket quite frequently and never run into a problem like this. When I simulate a flight, I'm getting about double the expected altitude and a huge decent rate (~200 ft/s) for all my designs. Even using the sample rocket provided, this is happening. Even if I use the same configuration and just re-run an old simulation, I get weird results. The original simulations don't match the new ones. I think I must have changed a setting somewhere but I can't seem to find it. Any help would be greatly appreciated.
Thanks!

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Chris Halinaty

My Flight Statistics for the Past Year

• Number of Flights: 31
• Total Impulse
  - Total: 710.01 Ns (11% J)
  - Average: 22.90 Ns (15% E)
• Altitude
  - Total: 4,232 Feet
  - Average: 1,058 Feet